In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 

[Q]: [header] How to find a penpal [title] Think about what you want to send. [step] There are many different ways to correspond with a penpal, and deciding on the one that's right for you makes it easier to sort through the number of penpal websites on the internet. Some people prefer communicating electronically while others like to use penpals as a means of creative communication. <sep> (A) [substeps] The international union of mail-artists is a website dedicated to those who like sending postal art to their penpals. Iumoa is a much more niche community as it has roughly 4 , 000 active members. (B) Read the different penpal websites carefully and decide on the one you wish to write a message for. [title] Enter the number and contact information you would like to use in the address bar (in the upper right hand corner of the web page). (C) [substeps] Remember that there is no set password to choose from across a thousands of websites, but feel free to use whatever feels most comfortable for you. [title] Narrow the search criteria to near the lowest classifications. (D) Some people like to send messages on social media or email, while other people prefer to send text messages or instant messages. [title] Decide which websites you want to find.
[A]: A


[Q]: [header] How to polish rocks [title] Choose the right rock. [step] You can polish any stone you wish, but there are certain characteristics of a stone that will make it easier to polish. If you want an easy stone to polish, pick a somewhat softer stone like onyx, limestone or calcite. <sep> (A) [substeps] You can polish diamond, granite or ceramic stones by cutting thin pipe holes or inserting dry mortar into one side of each hole. Look for a stone that resembles a diamond, but not necessarily a diamond. (B) Otherwise, a smoother, more pumice-like stone will be more difficult to polish. [substeps] Emeralds and equilateral manganese are both excellent mineral polishes. (C) Stones that are very hard will take a much longer time to polish. However, though hard rocks take a long time to sand, they yield more shine than softer rocks. (D) Softer rocks will actually work more well, and might look better to polish very old stones, but brighter stones tend to chip quicker. [substeps] Rubies, sapphires, and emerald are good options.
[A]: C


[Q]: Two women are preparing to do dives into a large pool. They walk forward, pose, then backflip into the pool. they <sep> (A) then get out and stand to the side, smiling and hugging at their good scores. (B) both smile and jump up, almost hitting the camera. (C) stand blathering, then start to dive into the pool. (D) stand up at the end of a diving board.
[A]:
A


